Package Includes: Complete engine head gasket set including head gaskets, cylinder head bolts, manifold gaskets, valve cover gaskets, intake manifold gaskets, and assorted seals. Compatible With: Enclave 2009–2016 3.6L V6 engine (RPO Code: LLT/LFX), Traverse 2009–2016 3.6L V6 engine (RPO Code: LLT/LFX), Acadia 2009–2016 3.6L V6 engine (RPO Code: LLT/LFX), Outlook 2009–2010 3.6L V6 engine (RPO Code: LLT). Installation Information: Installation requires disassembly of the cylinder head assemblies.Mating surfaces must be prepared according to manufacturer specifications for flatness and cleanliness.Cylinder head bolts must be torqued in sequence using the specified rotational angles.Timing chains and tensioners should be inspected and reinstalled according to factory timing marks.